[TRNSYS-users] I: type 73 and 2b

[David Bradley]

Carolina,
 Type2 models a controller that only has an ON and and OFF position. As 
soon as the pump turns on, it outputs its full flow. If you need a pump 
whose flow will vary, you need to use a controller (or an equation) that 
generates a signal between 0 and 1 that is proportional to the speed at 
which you want to run the pump.
Kind regards,
 David


Carolina Belli wrote:
>
> Hi,I'm a new user of TRNSYS, for my thesis
>
>  
>
> I have to simulate a solar desalination plant. For the solar collector 
> I use type 73 (flate plate), but I have a problem with the value of 
> the T out: it reach above 100°C.
>
> The solar circuit is: flat plate collector (type 73) -- storage tank 
> (type 4e) -- single variable pump. There is also a controller (type 
> 2b) to control the on/off of the pump. I connect the Th of type 2b 
> with Tout of the collector, and Tl of type 2b with the Tout of the 
> storage tank. The problem is when the pump have to start or to stop: 
> the flow rate rapidly increase/ decrease from 0 to the set value (and 
> vice versa).
>
> I try to decrease the flow through the collector but I can't manage to 
> solve the problem of the Tout of the panel.  
>
>  
>
> With many thanks,
>
>  
>
> Carolina
>
>  
>
>  
>
> ------------------------------------------------------------------------
>
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>   

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Thermal Energy System Specialists (TESS), LLC 
David BRADLEY                      22 N. Carroll Street - Suite 370 
Partner                            Madison, WI 53703 
                                   USA
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